Grammy Awards 2015: Top 5 Moments From the Show

From the speeches to the performances, get the lowdown on what you missed.

— -- The Grammy Awards' executive producer, Ken Ehrlich promised that the night would be jam-packed with jaw-dropping moments, and he wasn't wrong.

From the moment AC/DC kicked off the show in Los Angeles with their song "Highway to Hell," until the end, the crowd hardly left their feet, cheering for the performers as well as the winners.

"I think one of the things about this show is that I think people really do care about who wins Grammys," Ehrlich told ABC News before the show. "And I certainly know the artists care. So, you know, it makes it a more interesting show. There's a story to it, in addition to these great performances."

In case you missed it, here were five of the night's most memorable moments:

2. Sam Smith's Big Night: Smith said early on that he hoped to take home the Best New Artist trophy, and he got his wish. Fighting back tears of joy, he said to the crowd, "To mom and dad, I won a Grammy!" His huge night continued with wins for Best Pop Vocal Album, Song of the Year and Record of the Year. "It was only until I started to be myself that the music started to flow and people started to listen," he told the crowd. However, his night wasn't all about winning awards: He also performed "Stay With Me" with Mary J. Blige.

5. Kristen Wiig Makes an Appearance: Sia doesn't show her face when she performs, so during her rendition "Chandelier," she let Kristen Wiig and "Dance Moms" star Maddie Ziegler, who also appeared in the video for the song, do a dance for her.